Details: Offer valid on orders with a merchandise total $100 or more through Sunday, May 28, 2017 @ 11:59 pm [CST]. One gift certificate per household. Use Promo Code MEMORIAL during Checkout to claim your gift certificate. Gift certificate will be emailed to qualifying customers after order has been shipped and will expire 30 days from date of issue. Does not apply to coupons and manufacturer-mandated pricing, including brands: AquaIllumination, EcoTech Marine, Neptune, Reef Octopus, Coralvue, Coral Rx, Red Sea, Giesemann, Maxspect, Icecap, OASE, Matala, MVP, Back on Track, WeatherBeeta, Kensington, Horsewear Ireland Rambo, Oxbow, and Lafeber's.